china denies that but when cnn cameras approached the building security guards chased them away. >> drive away drive away, drive away. >> reporter: u.s. officials say cyber hackers each year are stealing $250 billion worth of u.s. trade secrets. now a white house report warned "the pace of economic espionage and trade secret theft is accelerating and jeopardizing our status as the world's leader for innovation and creativity." in response the obama administration is promising to pursue increased diplomatic pressure and tougher every forcement of trade policies. in addition to the justice department will seek more prosecutions for trade thefts. cbs national security analyst juan zarate says that won't be easy. >> it is figuring out who is behind the attack and enforce the law, get your hands on the perpetrators that makes it very difficult in cyberspace to bring these types of cases. >> now it's not at all clear just tougher talk from the white house will do very much to curve cyber theft but critics say it's at least a start because frankly for too long chinese hackers have been stealing